Lock



Aug. 27, 1940.

H. DAUM LOCK 5 Sheets-Sheet l Filed Nov. 16, 1937 INVENTOR ATTORNEYIS H.A. DAUM Aug. 27, 1940.

LOCK

5 SheeEs-Sheet 2 Filed Nov. 16, 1937 INVENTOR HOP/16234. DA UM ATTORNEY;

H. A. DAUM Aug. 27, 1940.

LOCK

Filed Nov. 16, 1937 5 Sheets-Sheet 3 "III, v

INVENTOR HORACE'A. 0140M. Q 7 WW ATTORNEYS H. A. DAUM Aug. 27, 1940.

LOCK

Filed Nov. 16, 1937 5 Sheets-Sheet 4 INVENTOR HORACA" A. 0 4044 7ATTORNEY.)

Aug. 27, 1940. H A. DAUM 2,212,707

LOCK

Filed Nov. 16, i957 5 Sheets-Sheet 5 INVENTOR HORACEA @AUM ,6 2

M0- MN Q @m 9 Mam ATTORNETJ Patented Aug. 27, 1940 UNITED STATES PATENTOFFICE 4 Claims.

This invention relates to improvements in door locks, and moreparticularly to looks designed to be used on large doors where it isdesirable to lock, latch, or secure the doors at a plurality 5 of pointsby means distributed to share the forces thereon and wherein all holdingmeans are operated simultaneously by means of a handle or knob common toall. Also, the invention relates to such locks for doors of smallersizes where great holding strength is desirable.

It frequently is necessary, or desirable, with doors of large size, orarea, to provide more than one looking point and to provide that it maybe released at all points simultaneously in order to simplify theopening thereof. Large doors of the kind used in pairs, have a tendencyto warp inwardly at the center, and this is usually enough that thelatching bolt of the lock carried on one door will pass by the otherdoor and catch on the inner edge thereof, or on large single doors thelatch passes by the door frame in the same manner. This results in astrain on the door, which is damaging and which, if continued over aperiod of time, will necessitate repair or complete 25 replacement.Furthermore, this is disagreeable to the person closing the door.

The present invention has for an object to provide improvements wherebythese undesirable results are eliminated, and therefore one of the novelfeatures of the invention is the provision of means for preventing thelatching bolt from slipping out of or past the recess that receives thelocking bolt except as is provided for.

Also, an object of this invention is to provide a latch or look to belocated at the center of the swinging edge of the door, as is the usualpractise, and also latches or locks located at the top and bottomthereof, operated by rods connected to the main locking units andoperated by one opening knob or handle;- the latching bolt of the mainlocking unit, or all of the locking units, designed to receive in slotstherein specially designed retaining plates.

Further objects of the invention reside in the details of constructionof the parts in their combination and mode of operation, as will behereinafter fully described.

In accomplishing the above stated and other objects of the invention, Ihave provided the improved details of construction, the preferred formsof which are illustrated in the accompanying drawings, wherein Fig. 1 isan inside elevation, partly broken away, of a pair of large doors, suchas used on garages or buildings, equipped with locks in ac"- cordancewith the present invention.

Fig, 2 is a horizontal section on the line 22 in Fig. 1.

Fig. 3 is an enlarged horizontal section, on the line 3-3 in Fig. l,particularly illustrating the latching bolt and the retaining platesengaging within the latching recess.

Fig. 4 is a vertical section on line d-4 in Fig. 3.

Fig. 5 is a vertical section on the line 55 in Fig. 4.

Fig. 6 is a detail of certain operating parts of the lock.

Fig. 6a, is a detail of the lock mechanism.

Fig, 7 is a vertical section on the line 1-4 in Fig. 3.

Fig. Fig. '7.

Fig. Fig, 1.

Fig. Fig. 9.

Fig. 11 is a View illustrating the use of a latch or lock of amodifiedform suitable where one door is used.

Fig. 12 is anenlarged detail of the modified latch.

Fig. 13 is a cross section on the line l3--l3 in Fig. 12.

Fig. 14 is a side view of an alternate form of construction. a

Fig. 15 is a front view of the same.

Fig. 16 is a back view of the same,

Referring more in detail to the drawings The reference numerals l and Hdesignate, respectively, the two swinging doors of a garage or building,hinged respectively at I0 and II, and adapted to swing outwardly fromthe enclosure as indicated by the direction of the arrows in Fig. 2.What will be referred to as the main locking unit and the receivinglatch unit are designated, respectively, at l3 and M. These units wouldordinarily be located within reach, preferably at points somewhat belowthe center of the door and at the swinging edge thereof.

Located at the upper and lower corners of the doors, respectively, andat the swinging edges, and directly in line with the main locks l3 and Marecorner latches ll5 and I6-l6'. These corner latches l5l5 are adaptedto catch and hold in recesses in the receiving housings l'l-I| at thetop of the door, and the lower corner latches, as here shown, areadaptedto likewise catch and hold in reinforced recesses l8l8' in a concretefloor l9. Rods 20 connect the bolts of 8 is a vertical section on theline 8--8 in 9 is a cross section on the line 9-9 in 10 is a crosssection on the line ill-l0 in the corner latches with the actuatingmeans of the main locking units l3 and M in such a way that upon theoperation of the latter, by their handles 2i and 22, as presentlydescribed, the corner latches, as well as the main lock, will bereleased so as to permit the opening of the doors.

Referring to Figs, 3 to 8 inclusive, it will be seen that the housing ofthe lock unit l3 comprises a metal back plate 25, flanged. along oneedge, as at 25a, to overlie the edge of the door I l in which it ismounted, and a formed cover 26 is affixed to and overlies the plate 25,forming a housing which contains the mechanism of the lock. Likewise,the housing of the lock unit i l comprises a metal back plate 28 flangedas at 28a, to overlie the edge of the door lii, in which it is mounted,and a formed cover 29 is afiixed thereto and provides a housing whichcontains the mechanism o1" the look, as will presently be described.

Handles 2i for lock unit it are provided at the inside and the outsideof the door. One handle member has an integral mounting shank 2w, squarein cross section, which extends through the lock and also through abearing plate 3i fixed to the outer handle as seen in Fig. 5, and whichplate Si is retained by an overlapping plate 3 l The shank, at theoutside of the door, extends into a square socket 2i in the outer handleand is secured therein by'a set screw 2 lit. The squareshank 2m extendsthrough a square hole 3% in the barrel 3% that is centrally formed inthe lock operating lever 3i, which, as seen in dotted outline in Fig. i,normally lies in a horizontal position. The barrel 3b is rotatablymounted in the lock housing and the lever, at its opposite ends, mountsa pair of rollers 3 id which, at their top edges, are in rolling contactwith a horizontal shoulder 32aof sliding cam plate 32, referred to asthe outer plate, and at their bottom edges are in rolling contact with ashoulder Idea. of a sliding cam plate 34, referred to as the innerplate; these plates being vertically slidable in the lock housing underthe turning action of the handles. The relationship of these cam platesis best shown in Figs. 4 and 5, and it will be observed that they haveopenings therethrough for passage of the handles.

A latch bolt 35, of substantially square cross section and rounded atits outer end, as at 35a, is held in a guide housing 36, which isaffixed horizontally to the main back plate 2-5 of the look. A spiralspring 31 set in a socket in the door and fixedly mounted at one end andhaving its opposite end secured to the bolt operates to. hold the latchtongue 35 yielding on its extended position and yields to allow the boltor tongue to be retracted.

Extending from the latch tongue, or bolt, 35 into operative contact withcam surfaces of the vertically slidable plates 32 and 34, is a boltactuating stud 38. It will be understood by reference to Figs. 4 and 5,that the inner plate 36 has a triangular opening with an inclined camedge 34b, and that the overlying portion of the plate 32 has atriangular opening with an inclined cam edge 3221. These two openingsoverlap, as shown in Fig. 4. On turning the lock handle, in eitherdirection, the plates are caused to move vertically; plate 32 beingactuated upwardly, and plate 3% downwardly. This sliding action of theplates causes the inclined cam surfaces 32b and ib to act on stud 38 tomove the bolt 315 inwardly and thus to release or unlock the door.

When "the handle is released, the spring acting on the bolt moves itback to extended position and the pressure of the stud against the camsurfaces causes the plates to be moved back to normal positions.

At its upper end, the plate 32 has an outwardly formed portion ii! insliding contact with the cover plate 265 and this operates to take sidethrust and to hold the upper end of the plate in proper alinement. Thisoutward bend of the upper part of the plate-prevents its interferencewith the rod 28. It also provides clearance for the rod 25, which isafiixed to the upper end of plate and extends through a hole '42 in thecover plate 26 to the latch device at the upper edge of the door.Elongated openings at and M in the cam plates 32 and 3&- respectively,provide for the passage of the handles 2!! and permit the plates to bemoved up and down inside of the housing.

A locking arrangement comprising a rotary spindle l5 extends through thelock housing, as in Fig. 5, and is revoluble in openings provided in theplate 25 and cover 25; the spindle having cylindrical bearing portions356!, and 451), Between the bearing portions, the spindle is rectangularin cross section, as shown in Fig. 4, and this part is normallycontained within circular openings ii? and ll in the sliding cam plates32 and B l respectively, and in direct alinement with slots the and did,that extend downwardly and upwardly respectively from these holes 46 andii. A turning handle 48 is affixed to the end of the spindle at theinside of the door and provides a manual means whereby the spindle maybe turned so as to throw the rectangular portions of the spindle tohorizontal position, crosswise to the direction of the slots 55ai-'Ea,thereby to prevent movement of the cam plates and the movement of thelatches.

A key barrel 5G is mounted in the outside face of the door, in the usualway, and, as shown in Fig. 6a, a gear ER is revoiubly mounted on theinside face plate 25 of the lock, and provided with a square opening toreceive the square bolt Eila connected with the lock tumbler. Gear 55may mesh with a gear segment 52 revolubly mounted on the face plate ofthe look. A key may be applied to the lock barrel 5%? to turn the bolt5m therein, thus to rotate gear 5i into mesh with gear segment 52, andincidentally to rotate rectangularpart 35 between locking and unlockingposition. As shown in Fig. do, there is a spring pressed latch 53engaging a notch 2b in segment 52, to yieldingly hold the bolt inunlocked position. A similar notch is provided to receive the latch 53to hold the bolt in locked position.

Contained Within the housing of the lock unit i l, which comprises theback plate 23, and the cover plate 2S2, is the lock operating lever 55,mounted by handles like those of the unit !3. The operating lever 55lies in a horizontal position and mounts a pair of rollers 550. at eachend thereof, which engage at their top surfaces against a shoulderformed on a sliding plate 56, and on the bottom surfaces abut against ashoulder 5'50. formed on a sliding plate 5?. The connecting rods 26 area axed to the sliding plates 56 and 5?, and the compression springs 59hold the plates yieldably in normal position, as shown in Figs. 7 and 8;

A strengthening plate 85, mounted on the rear- Wardside of the backplate 28, and conforming to the shape thereof, is equipped with a pairof spaced, vertically alined studs 86 which are internally threadedtoreceive bolts 87 which pivotally mount thereon latch tongue retainingplates '88, as seen in Figs. 3 and 4. These latch plates have endsdisposed to be received, upon the closing of the doors, in slots 89formed longitudinally inthe top and bottom edges of the tongue 35. Anextension spring 98, attached at its ends to pins 9| in the plates,draws these plates yieldably together. This spring is supplemented byother springs all mounted on the studs 86 and 87.

It may be stated that a tumbler lock 50 corresponding to that in unitl3, may also be incorporated in the lock unit M, as shown in dottedlines in Figs. 7 and 8.

Figs. 9 and 10 are enlarged, sectional details of the latches i5 and i6,each of which consists of a back plate 60 and a cover housing 6|, joinedtogether. The latch bolt 63 is slidable therein and a compression spring62 contained within the housing holds the latch bolt 63 at its extremeextended position. A rod 641 is threaded into the latch tongue 63, andextends through an opening $5 in the end wall of the housing Bl. Anenlarged portion, or flange, 66, on the outer end of the rod 64, abutsagainst the end wall of housing iii and limits the distance to which thelatching bolt extends beyond the opposite end of the housing. A rivet orstud 88, in the housing wall, spaced somewhat back from the inner end ofthe latch bolt 63, acts as a stop to limit the extent to which the boltmay be retracted. The connecting rod 23 is attached within the slottedouter end of the rod 6 4 by means of a pin ill.

On rotation of a handle of unit l3, the sliding plate 32 will be movedin an upward direction and the sliding plate 3t will be moved in adownward direction. Consequent to this, the stud 38 extending from thelatch bolt 35, is forced laterally by the action of the cam surfaces 32band 34b, in this way retracting the latch bolt 35, compressing thespring 31.

Also, upon the motion of the sliding plates, the rods 28 are moved so asto retract the latch bolts 63 of the latches l5 and [6. This allows thedoor H to open.

In Fig. 11, I have illustrated a variation of construction of the latchI5, to be used upon single doors where it is desirable to latchhorizontally to the side wall, instead of vertically to the portiondirectly above the door. Thislatch is designated by the referencenumeral 15, and has a receiving recess 15a to receive the latch bolt.

In Figs. 12 and 13, I have shown enlarged sectional details of thelatter type of latch, and it consists of a base plate H5 with a formedhousing 'il which contains the latch bolt 18. A spring 19 yieldablyholds the latch tongue in its forward or extended position. A cam plateoperates towithdraw or retract the latch bolt 18.

The cam plate 8!] lies between the back plate Hi and the latch bolt 18in a guideway 8|, formed by a cut out section in the housing flange 11a.The cam plate 89 has an angular surface 83 arranged to act on a roller83a fixed to the latch bolt so that incident to a motion in a downwarddirection of the cam plate, the latch tongue will be operated inwardlyto its retracted position.

Assuming the device to be so constructed, and assuming the doors to beclosed, they would be opened in the following manner: The handles 2| and22 are turned either upwardly'or downwardly, thus rotating the operatinglevers 3i and? 55, to actuate the sliding plates 32 and 34 in the lock[3, and the sliding plates 56 and 51 in unit l4.

In closing the doors, the rounded outer end of the bolt 35 will engagethe formed portion 28a of the back plate 28, as seen in Fig. 3, andcause the bolt to be moved inwardly against the action of spring 31.This allows the door H to close to the point where the latch tonguecomes into alignment with its receiving and retaining slot, and then itenters therein, holding the doors to:- gether in a closed position. Theouter ends of the retaining plates 88, when engaged by the rounded endof the bolt, are forced apart, then snap into the bolt'slots 89, thus tooperate to i hold the latch tongue 35 from being again forced inwardlyby reason of its rounded nose portion 35a engaging the lock housing andslipping out of the opening to the inner edge of the door as is it fromtheir recesses H and it, by the rollers 55a operating against theshoulders 523a and 57a of the sliding plates 56 and 5?, against thecompression springs 59. The upward motion of the plate 5%; and thedownward motion of plate El operates the rods 20.

Upon release of the handles 22, the springs 59 bearing against theshoulders 56a and 57a of the sliding plates 56 and 5! in the lock unitfl l bring the operating lever 55 back to a horizontal position, andalso the handle 22. Also upon the release of the handles 21, the spring3? bearing against the latch bolt 35 forces the sliding cam plates tothe position holding the operating lever 3!! in a horizontal position bythe stud 38 hearing against the cam surfaces 322; and 34h.

With the locking block 45 in a vertical position, as shown in Fig. 4, itpermits the sliding plates 32 and 3% to move upwardly and downwardly byreason of the slots 46a and Ma. By turning the locking block 15 to ahorizontal position in the circular openings 15 and M, it is no longerdisposed to allow the slots Mia and 4M to slide past it and in this wayholds the sliding plates 32 and 34 against movement and holds the entirelatch locked.

This may be accomplished by the lever 48 from the inside, or through akey in the tumbler lock 56 through one revolution, and the gears 5i and52, into mesh as seen in Fig. 6.

As illustrated in Figs. 14, 15 and 16, I have provided the latching unitHill, which is a latch bolt receiving mechanism. This consists of a backplate NH and solidly joined top plates H02 and 32b, held spaced from theback plate by sleeves 53 on connecting bolts Mi l. The plates I82 andI82?) are so located as to leave an opening I05 for the latch bolt N36to be received in. Two latch bolt holders ml and E68 are disposed toslide in the channel formed by the cross members Hi9 and H0, and be heldin a closed position by the springs IN. I

Pivotally mounted by the studs H5 are two opening levers I It, which areurged by the springs H8, which has one end affixed to the back plate EMand the other end afiixed to the opening lever, to a closed position,abutting against the stops 12c. Rollers i it are mounted at the swingingin the cross members M9 allows the stud I23 to move in an outwarddirection, and a slot 26 in the cross member I ill allows for movementof the spring Ell subsequent to the outward opening movement of the boltholders Ill? and MB. A sliding plate E28 is yieldably mounted by thespring ill, in such a way that it abuts against the cross members i l6and against the latch bolt holders Nil and W8, and is moved rearwardlyupon the entering of the latch bolt HES.

Assuming the device to be so constructed, its operation will be asfollows: It is intended that this latch bolt receiving mechanism be usedwith the conventional door latch or lock without the customary camsurfaces, and that by retracting the latch bolt in the usual manneropens the door. In closing the door, the latch bolt Hi6 is brought tobear against the opening lever H6 which swings inwardly against thetension of the springs l i8 as the door is closed and the latch bolt ismoved inwardly. The latch tongue holders ill? and N38 are opened apartby the operation of the opening levers i it and the links 52L As soon asthe latch bolt has passed the operating levers, they spring to a closedposition, as illustrated in Fig. it, by reason of the spring l 58, andthen when it has passed the bolt holders lill and H38, they in turnspring to a closed position by reason of the springs Hi. It should beunderstood, however, that the plate 428 is moved back by the latch bolt.Should the door fail to be closed sufficiently to catch the latch boltbehind the bolt holders Ill? and W3, it will be held by the shouldersH541 of the opening levers I Hi. This provides a double catch latch, andis intended to be used upon latches wherein a very heavy spring isutilized in the latch bolt unit, so that the door may be closed easily,but greater effort must be exerted to open it; such locks beingespecially adapted to use in automobile doors.

Having thus described my invention, what I claim as new therein anddesire to secure by Letters Patent is:

1. In a lock for a door adapted to swing between open and closedposition, a door locking means comprising locking bolts mounted by thedoor at top and bottom edges, a lock housing mounted on the door at alocation between the said edges, a pair of slide plates contained withinthe housing in the opposite end portions thereof, rods operativelyconnecting the plates respectively with the bolts; said plates havingadjacent end portions overlapped and formed with inturned opposedlyrelated parallel flanges, a handle mounted in the housing and having arotatable shaft extended between the plate flanges, and a cam leverfixed on the shaft engageable with the flanges for a simultaneousshifting of the plates in opposite directions to effect an unlockingaction of the bolts; each of said plates having a slot formed spindlemounted in the housing extending through said slots, and normallypermitting movement of the plates and adapted to be turned while in theenlarged portions of the slots to effect lockingv engagement with theplates.

2. In a lock for a door adapted to swing between open and closedposition, a door locking means comprising locking bolts slidably mountedon the door at top and lower edges thereof, means yieldingly urging thebolts to locking positions, a lock housing fixed on the door at alocation between the bolts, a locking bolt slidably mounted in thehousing and extending therefrom, a pair of slide plates in the housing,rods connecting the plates respectively with the locking bolts at topand lower edges of the door; said slide plates having edge portions inoverlapped relation and formed with flanges in opposed relation, andeach of said plates having an opening forming a cam surface, a stud onthe locking bolt of the housing engaged by said cam surfaces, a handlefor the lock having a shaft revolubly mounted by the housing andextended between the plate flanges, a lever fixed on the shaft with endsextended at opposite sides thereof to engage said flanges whereby tosimultaneously actuate the plates to effect a simultaneous retraction ofall the bolts.

3. In a door lock for a door adapted to swing between open and closedpositions, ahousing fixed to the door, a latch bolt slidable thereinwith one end extending beyond the door edge, yieldable means'urging thebolt to its extended position, a keeper adapted to receive the end ofthe latch bolt on closing the door by causing the bolt to be depressedinto the housing; said bolt having a rounded end and slots paralleltherewith in its opposite sides, a pair of retaining plates pivotallymounted in the keeper, a spring urging said plates together; said plateshaving camming edges to be engaged by the latch bolt end to spread themapart for seating in the slots on entrance of the bolt into the keeper.

4. In a lock for a door adapted to swing between open and closedposition, a lock housing, a lock bolt slidingly mounted in the housingand extending therefrom and means for yieldingly urging it into extendedposition, and a pair of pivotally mounted retaining plates adapted to beengaged by the extended end of the bolt, and to be spread apart therebyand a spring joining the plates and causing them to lock with theextended lock bolt, wherein the said lock bolt has a rounded end portionprovided on opposite sides with slots, and wherein the retaining platesare adapted to be spread apart by'the rounded end of the bolt actingthereon and to be seated in the said slots.

HORACE A. DAUM.

